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A New Electrically Conducting Metal-Organic Framework Featuring U-Shaped cis-Dipyridyl Tetrathiafulvalene Ligands.


ABSTRACT: A new electrically conducting 3D metal-organic framework (MOF) with a unique architecture was synthesized using 1,2,4,5-tetrakis-(4-carboxyphenyl)benzene (TCPB) a redox-active cis-dipyridyl-tetrathiafulvalene (Z-DPTTF) ligand. While TCPB formed Zn2(COO)4 secondary building units (SBUs), instead of connecting the Zn2-paddlewheel SBUs located in different planes and forming a traditional pillared paddlewheel MOF, the U-shaped Z-DPTTF ligands bridged the neighboring SBUs formed by the same TCPB ligand like a sine-curve along the b axis that created a new sine-MOF architecture. The pristine sine-MOF displayed an intrinsic electrical conductivity of 1 × 10-8 S/m, which surged to 5 × 10-7 S/m after I2 doping due to partial oxidation of electron rich Z-DPTTF ligands that raised the charge-carrier concentration inside the framework. However, the conductivities of the pristine and I2-treated sine-MOFs were modest possibly because of large spatial distances between the ligands that prevented π-donor/acceptor charge-transfer interactions needed for effective through-space charge movement in 3D MOFs that lack through coordination-bond charge transport pathways.

SUBMITTER: Gordillo MA 

PROVIDER: S-EPMC8517321 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature

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A New Electrically Conducting Metal-Organic Framework Featuring U-Shaped <i>cis</i>-Dipyridyl Tetrathiafulvalene Ligands.

Gordillo Monica A MA   Benavides Paola A PA   Spalding Kaybriana K   Saha Sourav S  

Frontiers in chemistry 20211001


A new electrically conducting 3D metal-organic framework (MOF) with a unique architecture was synthesized using 1,2,4,5-tetrakis-(4-carboxyphenyl)benzene (TCPB) a redox-active <i>cis</i>-dipyridyl-tetrathiafulvalene (<i>Z</i>-DPTTF) ligand. While TCPB formed Zn<sub>2</sub>(COO)<sub>4</sub> secondary building units (SBUs), instead of connecting the Zn<sub>2</sub>-paddlewheel SBUs located in different planes and forming a traditional pillared paddlewheel MOF, the U-shaped <i>Z</i>-DPTTF ligands br  ...[more]

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